Sheetsxsheet i



y 1952 H. F. DAVIS ET AL 2,598,513

TRIMMING DEVICE FOR STOCK FOR LOOM REED DENTS Filed May '7, 1948 2 SHEETS-SHEET l INVENTORS.

JWSI aux/ y 1952 H. F. DAVIS ET AL 2,598,513

TRIMMING DEVICE FOR STOCK FOR LOOM REED DENTS Filed May 7, 1948 2 SHEETS-SHEET 2 50 x O o \O) IO O (o) ."o)-

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Patented May 27, 1952 TRIMMING DEVICE FOR STOCK FOR LOOMREED DENTS Howelf FL Davis, .Wicklifie. and Earl X. Southam and Fred Crossm'an, -Cleveland;'0hio, assignors ,to The'Lindsay Wire Weaving Company, Cleve;

land,- hio;a corporation ofOhio E i Antecedents-it. v. 1948, Srial ma paper making machines, where even a slight pro- Section o-f one dent beyond the 7 general plane thereof in the reed,- or even burrs at the edges of the-dents, causes a kink or irregularity of the-lay wire or damage to it-which prevents the'formation of the perfect wire fabric desired.

It is the object of the present invention to provide an efficient machine for trimming the edges {Claims I (C1 29- -76) of a ribbon of stock to bring it not only to exactly .thesame width throughout and render its active edgessmooth, but also to remove any projecting burrs where the faces of such edges join the flat faces of the ribbon. When such treated stock is cutinto proper lengths, dents are produced which when mounted in the reed present a single plane of smooth front edges to engage the lay strand.

In accomplishing our object, we take a ribbon of suitable material, preferably steel, wound upin spiral formation and feedthe same between a pair of spaced abradingdevicesrto true theopposite edges, and thereafter we. feed-the stockbetween; other abrading members adapted to remove any burrsat the corners of the strip. For the edge-face trimming,.we preferably provideaplurality of pairsof opposed files, such pairs being of successively finer formation. After. these files have acted against the thin parallel edges of the stock, we engage the corners of thetrimmed stock by trimming members preferably very fine files set at an angle to each other there being two sets of these angularly set trimmers to act respectively against the two bottom corners of the stock and the two top corners.

An embodiment of -our machine having the above general features is illustrated in the drawings hereof and is hereinafter more fully described.

--In the drawings, Fig. 1- is aside elevation of our complete trimming machine} Fig. 2 is a plan of either of two surmounting and spaced guiding members between which the stock passes; Fig. 3 is apl'an of a clamp carrying a pair of facing files -.which a're clamped against opposite sides of the guiding members, the clamp being partly broken out to indicate the-files beneath the top of the clamp, the convergenceof the guiding members and thefiles slightly toward the discharge end ;'shewn in -Figs. 2 and 3- being exaggerated for el'ear'ness'of ill-ustration; -Fig. 4 is an elevationof Lil ' the clamp mounted on the guiding members; Fig.

5 is a cross section of the same in a plane indicated bythe line 5-5 JO-nFiglBLEigUG .isa plan of the device for removingnthe burrs 'j.from..t he corners of'the'.trimmed-stock; Fig. J'Z is an .elevation of the last-mentioned. device .Figs. Brand 59 are vertical cross sectionsonthe correspondingly numberedlinesonl ig..7.. l z In Fig. l wehave indicatedan elevation .of our complete. trimming and smoothing mechanism associated with means for ,carryingawound-up roll of untrimmed stock, .means for winding .up the stock after trimming, and suitable mechanism for. propelling. such stock. In thisvieww indicates suitable supplyreel carrying. .in.wound..- u p form the ribbon of stock A, which .isp'referably asteel r-ibbonhavinga width slightly. greater than thatdesired for the finished dent... I -2,-in.dicates-a corresponding reelufor winding ,u-pthe finishedstock. l,3 indicates;a pair of. feedrollsto engage. opposite faces ofithestockathese, .rolls beingsuitably driven, for. instance by a motor I34 connected by.s:uitab1e be1t|5 with .:a drivenbelt pulley IS-onthe shaft of oneof the rolls.

Between the supply reel vI Oandthe feeding-rolls we have provided a table 20 which carries-the trimming mechanism. On this table the first device adjacent the supply roll I!) is a, suitable cleaner 2| having brushes or wipers (notrshown) .toengage thestock. The table-carries beyondthe cleaner two trimming devices 3%, one, acting after the other,-.-and-both identical except-in their ad:- justment and. fineness of the files they carry. Following the last trimmer is a .burr remover 50 ac tingon the four-corners of the-trimmedstock.

As shown,- each trimming device comprises a pairof surmounting-bars 3| and .32, held with -a spacebetween'them for the passage'of a ribbon, and a clampingidevicet0 having a-pair of aside plates 41 each carryingan inwardly facing file 42 to provide opposed abrading. members to engage opposite edges of theribbon. Each of-the members 3'! and 32 isformed'with a sligl'ltly converging shank 33 with =1atera1. extensionsfit at its opposite ends. One of these members -31 rests on and is secured to thetable; the othenmember rests on a pair of end shims '3'5-sm-mounting-. -the heads 34 on the lower member..Suitable screws 35 pass through the upper extension 34, then through the-shimsand then through the lower extensions 34. and are threaded in the table-101p- Such. screws therefore serve to hold the complete guiding device together and hold it in posi'tionon the table.v

The clamp 40 comprises a pair of plates M each carrying on. its innenface'a file'42, such fllesbei'n'g "secured-to the'plates bysultable-screws 43"coun- 3 tersunk in the files and threaded in the plates. 44 indicates a distance piece in the form of a bar rectangular in cross section lying between the uppermost portions of the plates 4 I. Between the files and this bar is a row of clamping bolts which pass freely through one of the plates and are threaded in the other.

When the clamping device described is put in place with the files on opposite sides of the guid-' ing bars 3| and 32 and the clamping screws 45 tightened, the files are clamped tightly against opposite faces of the two guides 3| and 32. Each guide member 3! and 32 and also the distance bar 44 tapers slightly toward the discharge end. This taper is preferably only a few thousandths of an inch and hence is exaggerated in Figs. 2 and 3 for clearness of illustration.

A plurality of these trimming devices, as just described, is mounted on the table for successive action on the ribbon. We have shown two of the devices. They are identical except that the second device preferably carries files of finer formation than the first and such files are slightly closer together than in the first trimmer. We have found it satisfactory to hold the discharge ends of the files of the first trimmer .003" nearer together than the entrance end thereof, and to make the entrance end of the second trimmer .001" wider than the discharge of the first one and the discharge of the second trimmer .002" t narrower than its entrance.

By mounting the files removably on the removable clamping device 46, such device may be readily removed and the files replaced by fresh files whenever desired.

The result of passing the clean stock through the sucessive trimmers is that the two opposite edges are rendered perfectly smooth and flat and the discharged ribbon is given a definite width corresponding to the discharge width of the final trimmer. Such files, however, may leave slight burrs on the four corners of the file stock. We accordingly provide beyond the last trimmer a device for removing these burrs. Such device is illustrated in general elevation at in Fig. 1 and in detail in Figs. 6 to 9 inclusive and will now be described.

As shown, the body of the first corner trimming member 50 comprises a block 5| having projecting ears 52 through which screws 53 pass into the table '20. vided with a substantially V-shaped recess in which are seated a pair of very fine files 55 at substantially right angles to each other and each at 45 to the edge of the stock passing between them. Surmounting the block 5i is a presser stock, is a downwardly facing, angular trimmer for the top corners. As shown, the block 51 carries an elevated horizontal extension shown as secured to the block by horizontal screws 6! passing through ears on the far end of the block. The far end or" this elevated extension is supported by a block 62 to which it is secured by screws 63. The block 92 is attached to the table by screws 65. passing through bottom cars 65 on the block. In the under face of the extension At its top this block is proall 68 we mount a pair of very fine files 66 at right angles to each other, each at 45 to the edge of the ribbon A.

In the space beneath the extension 60 we place a plate 61, slidably mounted on four studs 68 threaded into the table top 26. The plate 61 is adjustably pressed upwardly by compression springs 69, surrounding the four studs and adjusted by nuts 10 threaded on the studs. By this means we are able to press the stock A upwardly with the desired pressure to bring its upper corners against the fine files 66 to trim oif any burrs at such corners.

It will be seen that our mechanism first reduces the width of the stock to a very accurate dimension and smooths the opposed edges thereof and then trims off any burrs first at the lower corners of the stock and then at the upper corners, the stock being then discharged in perfect condition for cutting into dents. Due to the provision for regulating the pressure of the two sets of corner files against the stock we avoid any material rounding of the stock at the corners but do trim off any projecting burrs.

It is convenient to wind up the finished stock on a reel for future use and that is the way it is illustrated in Fig. 1. However, if desired it; may be passed from our trimming machine directly to any suitable machine for cutting it into lengths. In either case it is only necessary to cut the finished stock into proper lengths to make perfect dents for loom reeds.

We claim:

1. In an apparatus for trimming ribbon stock, the combination of a table, a pair of rigid bars spaced in parallel relation to form a channel for ribbon stock and each having a laterally extending head at each end, means on the heads for securing the bars in spaced relation to the table, and a removable clamp having a pair of side plates adapted to enclose the open longitudinal sides between the bars and having a longitudinally extending file on the inner side of each side plate, and means on said clamp for tightening the clamp to hold the files in fixed relation against the opposite sides of the guide bars.

2. In a trimming machine, the combination of a pair of stationary ribbon guide bars extending in the same general direction and spaced apart in parallel relation, the opposite edges of the bars converging slightly toward one end, means for holding a pair of abrading surfaces in normal relation against opposite converging edges of the bars and thereby bridging the space between the bars, and means operatively associated therewith for progressing a ribbon of stock between the bars longitudinally thereof and in a direction toward their converging ends.

HOWELL F. DAVIS. EARL A. SOUTHAM. FRED CROSSMAN.

REFERENCES CETED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 337,689 Logan Mar. 9, 1886 338,603 Logan Mar. 23, 1886 471,977 Jones Mar. 29, 1892 897,408 Roovers Sept. 1, 1908 1,155,609 Odabashian Oct. 5, 1915 1,710,941 Nikolais Apr. 30, 1929 2,306,620 Futhey Dec. 29, 1942 

